Obsidian
Obsidian (Volcanic Glass)
Category
Browse not a rock (animated character) specimens identified by the Rock Identifier community.
Obsidian
Obsidian (Volcanic Glass)
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
Native Copper
Native Copper (Cu)
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
Red Chert (Jasper)
Silicon Dioxide (SiO2)
Sodalite
Sodium Aluminum Silicate Chloride (Na8Al6Si6O24Cl2)
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Marble
Recrystallized Carbonate Rock (CaCO3)
Quartzite Pebbles
Quartzite (SiO2)
Basalt (Vesicular)
Basalt (Mafic Extrusive Igneous Rock)
Basalt River Cobble
Basalt (Aphanitic Mafic Volcanic Rock)
Green Jasper
Jasper (Silicon Dioxide, SiO2)
Turquoise
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
Ironstone Concretion (Limonite/Goethite)
Ferruginous Sandstone / Ironstone (FeO(OH)·nH2O)
Obsidian
Obsidian (Volcanic Glass)
Milky Quartz with Iron Oxide Staining
Quartz (Silicon Dioxide, SiO2)
Jasper (specifically Bloodstone or Heliotrope variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
Chert (Flint)
Chert (predominantly SiO₂ - silicon dioxide)
Gneiss
Gneiss (High-grade metamorphic rock composed primarily of Quartz, Feldspar, and various Micas)
Pearl (with Peridot)
Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Blue Agate (Dyed Chalcedony)
Silicon Dioxide (SiO2)
Diorite
Phaneritic intermediate plutonic rock
Green Aventurine (Green Quartzite)
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Celestite (Celestine)
Strontium sulfate (SrSO4)
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Stromatolite
Biogenic Sedimentary Rock (composed predominantly of CaCO3)
Garnet Schist
Almandine Garnet-Mica Schist (X₃Y₂(SiO₄)₃)
Greenschist with Quartz Veining
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
Orange Calcite
Calcite (CaCO3)
Smoky Quartz in Matrix (Pegmatite)
Silicon Dioxide (SiO2) with Potassium Feldspar and Biotite mica
Agate (Water-Worn Pebble)
Silicon Dioxide (SiO2) - Chalcedony
Turquoise
Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
Pink Granite
Phaneritic intrusive felsic igneous rock
Agate Geode Node
Cryptocrystalline Quartz (SiO2)
River Stone / Pebble
Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)
Granite
Granite (a plutonic igneous rock composed primarily of quartz and feldspar)
Rhodochrosite
Manganese carbonate (MnCO3)
Moss Agate
Silicon Dioxide (SiO2) with inclusions of Manganese or Iron oxides
Hematite
Iron (III) Oxide (Fe2O3)
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
Druzy Agate (specifically Black Druzy Agate)
Silicon Dioxide (SiO2)